The Alliance was a 1937 rebuild of an older theater called the Imperial. Fox Intermountain had recently opened the rebuilt and renamed house, according to Boxoffice of November 20 that year. The Imperial had already been completely remodeled before, as reported in Movie Age of January 19, 1929.

Fox Intermountain was still operating the Alliance when the house was reseated in 1956, reducing capacity from 900 to 756, according to Boxoffice of June 2.

Updated and remodeled again in 1976, the Alliance was then being operated by Commonwealth Theatres, as reported in Boxoffice of October 11.

I’ve found nothing in Boxoffice about the multiplexing of this theater.

I’m not doubting that the theater was multiplexed, just saying that I can’t find anything in Boxoffice about it. I had hoped to find an item that would reveal the year that it was done, and that might give the new seating capacity.